60 lines
830 B
Go
60 lines
830 B
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/sha256"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"github.com/fd0/khepri/chunker"
|
||
|
|
)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
count, bytes := 0, 0
|
||
|
|
min := 0
|
||
|
|
max := 0
|
||
|
|
|
||
|
|
var (
|
||
|
|
err error
|
||
|
|
file *os.File = os.Stdin
|
||
|
|
)
|
||
|
|
|
||
|
|
if len(os.Args) > 1 {
|
||
|
|
file, err = os.Open(os.Args[1])
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ch := chunker.New(file)
|
||
|
|
|
||
|
|
for {
|
||
|
|
chunk, err := ch.Next()
|
||
|
|
|
||
|
|
if chunk != nil {
|
||
|
|
fmt.Printf("%d %016x %02x\n", chunk.Length, chunk.Cut, sha256.Sum256(chunk.Data))
|
||
|
|
count++
|
||
|
|
bytes += chunk.Length
|
||
|
|
|
||
|
|
if chunk.Length == chunker.MaxSize {
|
||
|
|
max++
|
||
|
|
} else if chunk.Length == chunker.MinSize {
|
||
|
|
min++
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if err == io.EOF {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var avg int
|
||
|
|
if count > 0 {
|
||
|
|
avg = bytes / count
|
||
|
|
}
|
||
|
|
|
||
|
|
fmt.Fprintf(os.Stderr, "%d chunks, average size %d (%d min size, %d max size chunks)\n",
|
||
|
|
count, avg, min, max)
|
||
|
|
}
|